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Unit 1:
Ch. 1
Ch. 2
Ch. 3
Interlude A
Unit 2:
Ch. 4
Ch. 5
Ch. 6
Ch. 7
Ch. 8
Ch. 9
Interlude B
Unit 3:
Ch. 10
Ch. 11
Ch. 12
Ch. 13
Ch. 14
Ch. 15
Interlude C
Unit 4:
Ch. 16
Ch. 17
Ch. 18
Ch. 19
Interlude D
Unit 5:
Ch. 20
Ch. 21
Ch. 22
Ch. 23
Ch. 24
Ch. 25
Interlude E
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  • Y-linked: See sex-linked.
  • yield: The amount of a crop produced per unit of farmland.
  • yolk sac: The structure in most developing animals that becomes the yolk of the egg, but that in the developing mammal gives rise to blood cells and the cells that produce gametes.

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